NFL Draft 2013: Four Prospects with Major Red Flags

Red flag: A distinction no NFL draft prospect wants to be saddled with. From failed drug tests to injury concerns, every year there are a handful of players who give NFL personnel pause.

In the video above, Josh Zerkle and I take a look at four prospects who, for whatever reason, may have general managers thinking twice before pulling the trigger and selecting them in a few weeks when the league's annual selection process takes place at Radio City Music Hall.